Hello @Gleb Demidchik ,
Thank you for reaching Microsoft!
I tried to reproduce from my end and getting only the "access" action. As per the documentation it is mentioned that Analytics aggregates might not be available for all action types.
Document reference:https://learn.microsoft.com/en-us/graph/api/itemactivitystat-getactivitybyinterval?view=graph-rest-1.0&viewFallbackFrom=graph-rest-beta&tabs=http
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